I know this is a little old but I am sure that more will have this issue. Yes its a 2 man job. Not real hard but to much for 1 person. You just unscrew the screws on each end of the top rail and lift it out. I turned mine and took it out into the kitchen area where there is more room to work.

I actually had my middle door come off the rail. Come to find out the screws just came out. Not sure where they went. Either way....Called SEA (Shower Enclosure of America). Well actually I emailed them because I could not get thru on the phone. info@seamerica.com or 800-536-7324 They are in Ontario, California. They replied to my email quickly and gave me a call. They just asked me some simple questions describing my setup and then offered to send me new screws and rollers free of charge. Very pleased with that customer service!!

Thanks for the update. We just purchased a Columbus with the same doors. The first day the top screw for the middle door came out and we have lost another since. Bad design. How is it holding up since you did the repair?

I know this is a little old but I am sure that more will have this issue. Yes its a 2 man job. Not real hard but to much for 1 person. You just unscrew the screws on each end of the top rail and lift it out. I turned mine and took it out into the kitchen area where there is more room to work.

I actually had my middle door come off the rail. Come to find out the screws just came out. Not sure where they went. Either way....Called SEA (Shower Enclosure of America). Well actually I emailed them because I could not get thru on the phone. info@seamerica.com or 800-536-7324 They are in Ontario, California. They replied to my email quickly and gave me a call. They just asked me some simple questions describing my setup and then offered to send me new screws and rollers free of charge. Very pleased with that customer service!!

Thank you!! I have the same [problem on my 2017 Columbus 383FB. And thanks for the contact info.